Question

以下是“Location”集合中的mongo db文档

{ _id: "FortWorth", _class: "com.hack.whereru.Location", position: [ 32.862029, -97.32298 ] }
{ _id: "Richardson", _class: "com.hack.whereru.Location", position: [ 32.930942, -96.626729 ] }
{ _id: "Austin", _class: "com.hack.whereru.Location", position: [ 30.307168, -97.747908 ] }
{ _id: "A", _class: "com.hack.whereru.Location", position: [ 0.001, -0.002 ] }
{ _id: "B", _class: "com.hack.whereru.Location", position: [ 1, 1 ] }
{ _id: "C", _class: "com.hack.whereru.Location", position: [ 0.5, 0.5 ] }
{ _id: "D", _class: "com.hack.whereru.Location", position: [ -0.5, -0.5 ] }
{ _id: "Berlin", _class: "com.hack.whereru.Location", position: [ 13.405838, 52.531261 ] }
{ _id: "Cologne", _class: "com.hack.whereru.Location", position: [ 6.921272, 50.960157 ] }
{ _id: "Dsseldorf", _class: "com.hack.whereru.Location", position: [ 6.810036, 51.224088 ] }

我的代码：

private static final Point DUS = new Point( 13.405838, 52.531261 );

@RequestMapping(value = "/showFromMongos", method = RequestMethod.GET)
public String showFromMogoDB() {

    template.indexOps(Location.class).ensureIndex( new GeospatialIndex("position") );

    // prepare data
    repo.save( new Location("A", 0.001, -0.002) );
    repo.save( new Location("B", 1, 1) );
    repo.save( new Location("C", 0.5, 0.5) );
    repo.save( new Location("D", -0.5, -0.5) );

    repo.save( new Location("Berlin", 13.405838, 52.531261 ));
    repo.save( new Location("Cologne", 6.921272, 50.960157 ));
    repo.save( new Location("Dsseldorf", 6.810036, 51.224088 ) );
    List<Location> locations = repo.findByPositionNear(DUS , new Distance(1, Metrics.KILOMETERS) );


    return "Success";
}

“findByPositionNear”适用于

private static final Point DUS = new Point( 13.405838, 52.531261 );

但如果我给Fortworth的坐标，比如说，

 private static final Point DUS = new Point( 13.405838, 52.531261 );

失败，但例外情况是：

错误17444传统点超出了球形查询的范围。

有一个我已经研究过的相关问题，它没有足够的信息。

还有其他方法吗？或者任何人都可以解释为什么一个有效而另一个无效？

Answer 1

正如已经强调的那样，在球形查询上有一个vaildator，findByPositionNear和mongodb $ near函数使用。

尝试

Circle area = new Circle(new Point(13.405838, 52.531261), new Distance(radius, metric));
Location l = locationCrud.findByPositionWithin(area);

Circle没有这样的限制。

错误17444传统点超出了球形查询的范围

1 个答案: